Controlling device for elevators



(No Model.)

0. E. FOSTER. v CONTROLLING DEVIGE FOR ELEVATORS. No. 530,936.

Patented Deo. 18, 1894.

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1 Wain woo ea UNITED STATES PATENT OFFICE.

CHARLES E. FOSTER, OF \VASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO THENATIONAL COMPANY, OF CHICAGO, ILLINOIS.

CONTROLLING DEVICE FOR ELEVATORS. v

SPECIFIGATION forming part of Letters Patent No. 530,936, dated December1 8, 1 894.

Application filed April 14, 1892- Serial No. 429,204. (N0 model.)

consists of the parts fully set forth hereinafter used in connectionwith one or two cables secured at the ends to fixed supports and formedinto loops passing around pulleys with means for contracting andrelaxing the said loops so as tomove the stopping and starting device.

r In the accompanying drawings: Figure 1 is an elevation of sufficientof an elevator apparatus to .illustrate my invention in connection withone operating cable. Fig. 2 is the same in connection with two operatingcables.

The elevator engine A, is of any suitable character and is provided witha stopping and startingdevice C, the character of which willdependuponthat of theengine. Asshown, the engine is a hydraulic engineprovided with a stopping and starting device in the form of a valve tothe stem of which is connected any suitable form of shifting device asset forth hereinafter.

The cage X, travels up and down the well under the action of the engineas usual and v carries a guide-pulley or pulleys h, and one or moretake-up pulleys or sheaves e, the latter being shifted vertically bymeans of a hand lever d, or other suitable device within the cage. 1

Upon the shifting device for the stopping and starting device, whethersaid shifting device is in the form of the stem 8, of the valve as shownin Fig. 1, or a lever s, as shown in Fig. 2, is a support for a pulleyor pulleys g, and at the top of the well are one or more guide pulleysf, each of which may be upon a counterbalanced lever 16, for the purposeof one of the pulleys e, upward over one of the pulleys f, and down andaround one of the pulleys g, up again and over one of the pulleys h, andthence downward to another eyebolt or fixture t", at the bottom of thewell. This is the arrangement of each of the cables when two are used asin Fig. 2, or of the single cable when one is used as in Fig. 1, and rit will be seen that the cable is formed into a numberof bights orvloops one of which passes around the movable sheave e, while the otherpasses around the movable sheave g. When a single cable is. used aweight w,

is the means of moving the single sheave or pulley g, in one direction,but when two cables are used the pulleys g, g, are upon opposite ends ofthe lever s.

Whether the single or the double cable be employed the movement of eachpulley e, carried by the cage serves either to relax or contract thebight 00, that passes around or embraces the pulley g, connected withthe stopping and starting device. Thus, any vertical movement of theshifting device upon the cage is the means of imparting motion to thestopping and starting device. In the case of a single cable this motionis imparted positively in one direction by contracting the bight 0c, andin the other direction by the weight w, but when two cables are used inconnection with pulleys upon opposite ends of a cross bar carried by thelever d, as shown in Fig. 2, the movement is positive in bothdirections. 8 5

If desired the pulley e, at the side ofthe cage, may turn upon a fixedbearing and the lower pulley h, may be. adjustable and constitute theshifting pulley as in the other apparatus of this character, and asindicated in dotted lines Fig. 1.-

I am thus enabled to make use of one or two standing cables, eachsecured at both of its ends at opposite ends of the well and yet securea loop for receiving the pulley con- 5 nected with the stopping andstarting device, which is not aifected by the movement of the cage butwhich may be contracted and released from the cage to impart propermovement to the said stopping and starting deroo to maintain the cabletaut, I may use a spring for lifting the eye-bolt to which the cable isattached, as shown in Fig 2.

Without limiting myself to the precise construction and arrangement ofparts shown and described, I elaim- 1. The combination with a cage,engine, and stopping and starting devices, of guide pulleys adjacent tothe ends of the well, one being .movably supported and connected withthe stopping and starting device, a guide pulley and a shifting pulleyon the cage, and a cable connected at opposte ends to supports at thebottom and top of the Well and passing around said pulleys formingbights, the contracting and releasing of which shift the stopping andstarting device, substantially as described.

2. The combination of the cage and stopping and starting device of anelevator, of a shifting pulley on the cage, a movable pulley connectedwith the stopping and starting device and a cable connected at its endsto supports at the bottom and top of the well and formed into bightspassing round the 2 5 shifting pulley and the pulley connected with thestopping and starting device, substantially as set forth.

3. The combination of a cage, stopping and starting device, a lever onthecage carrying two shifting pulleys e, 6 guide pulleys h, it,connected with the cage, guide pulleys at one end of the well, a leverat the opposite end of the well carrying guide pulleys and connectedwith the stopping and starting device and two cables each connected atits ends to supports at the opposite ends of the well and passing roundsaid pulleys, substantially as described. a

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES E. FOSTER.

Witnesses:

J. S. BARKER, G. P. KRAMER.

